MELL in the calculus of structures

  • Authors:
  • Lutz Straßburger

  • Affiliations:
  • Loria & INRIA Lorraine, Projet Calligramme, 615 rue du Jardin Botanique, 54602 Villers-léés-Nancy, France

  • Venue:
  • Theoretical Computer Science
  • Year:
  • 2003

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Abstract

The calculus of structures is a new proof theoretical formalism, like natural deduction, the sequent calculus and proof nets, for specifying logical systems syntactically. In a rule in the calculus of structures, the premise as well as the conclusion are structures, which are expressions that share properties of formulae and sequents. In this paper, I study a system for MELL, the multiplicative exponential fragment of linear logic, in the calculus of structures. It has the following features: a local promotion rule, no non-deterministic splitting of the context in the times rule and a modular proof for the cut elimination theorem. Further, derivations have a new property, called decomposition, that cannot be observed in any other known proof theoretical formalism.